Valve-grinder.



F. C. HERSEE.

VALVE GRINDER.

APPLICATION FILED N,OV.I1,19I5.

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Patented Mar. 7,1916.

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HEKDSEE, GE BOSTGN, MASSfiCHUSE'ETS.

VALVE-GRINDER.

invests.

To all whom it mag concern:

Be it known that l, FREDERICK C, Hansen, a citizen of the United States, and a resident of Boston, in the county of Sui'i'ollr and State of Massachusetts, have invented certain new and useful improvements in Valve- Grinders, of which the following is a specification.

T his invention relates to certain improvements in valve grinders and more particularly to' that type adapted to be operated by hand to oscillate the valve in the valve seat.

In my improved construction, the tool which operatively engages with the valve is connected to a coil spring and to a drum, so that the operator may rotate the tool in one direction by unwinding a cord or cable from the drum and at the same time put the spring under tension so that the spring will rotate the tool in the reverse direction when the tension on the cord or cable is released.

My invention involves certain details of construction and arrangement of parts hereinafter more particularly pointed out.

Reference is to be had to the accompanying drawing in Which similar reference characters indicate corresponding parts in the two views, in which- Figure l is a longitudinal section through a device constructed in accordance with my invention, and Fig. 2 is a transverse section substantially on the line 2-2 of Fig. 1.

In the specific formillustrated, the body portion is in the form of a casing made up of two sections 10 and 11 forming therebetween achamber 12. The two casing sections may be secured in any suitable manner as for instance by bolts or screws 13 extending through bearings or lugs 14 projecting outwardly at the meeting; edges. Journaled in the casing is a central shaft or arbor 15, one end of which projects downwardly through a bearing, collar, or bushing 16 in the lower casing section 11, while the other its into a socket and rests against a thrust bearing 17 in the upper casing section 10. The shaft is free to rotate and is held against longitudinal movement by a removable pin or stud 18 extending throughthe bearing 16 into an annular groove 19 in the shaft. The lower end of the shaft which projects beyond the casing s constructed in any suitable manner for the detachable engagement therewith of a tool 20. llh-is tool is illustrated as ext ending into a socket at the lower extends through a Specification of Letters Patent. Pmfigygtgqli May, 7 snag Application filed November 11, W15. Serial 1%. 6%,839.

end of the shaft and held therein by a set screw 21, although I do not desire to be limited in any way to this form of connection. lhe tool at its lower end is shown as being provided with two pins or studs 22 adapted to enter recesses or engage with coa-cting parts on the face of a puppet valve so that when the tool is rotated, the valve will be turned in its seat.

7 For rotating the shaft and tool, 1 provide a drum 'or pulley 23 within the casing and rigidly connected to the shaft. The pulley has a central, open top chamber 24: within which is mounted a coiled band spring 25. The inner end of the spring is rigidly connected to the shaft while the outer end terminates in a loop 26 receiving a pin or stud 27 extending downwardly from the upper casing section 10. The spring, having one end secured to the casing andthe other end to the shaft, is normally under tension and normally tends to rotate the shaft 'in one direction. For rotating the shaft in the opposite direction, 3: provide a cord or cable 28 wound in a peripheral groove of the pulley 23 and having'one end secured to the pulley. The opposite end of the cord or cable tangentially disposed opening in the casing and'i's connected to a suitable handle 29. For guiding the cable through the opening in the casing, I provide a sleeve or tube 30 which may be of steel or other material harder than the material forming the casing parts, or better adapted to withstand the action of the cable in passing back and forth therethrough. This guiding tube is shown as flared so as to avoid sharp edges which might increase the wear on the cable. T he bearing sleeve may be held in place in various difierent ways but is preferably clamped between the two casing sections in the plane of their meeting edges and in outwardly extending, integral lugs 81. The tube may be prevented from endwise movement by a pin rigid therewith and lying in a groove in one or both of the meeting edges of the casing sections.

As the spring is normally under tension it normally tends to draw the cable into the casing and wind it on the drum. Thus, the

handle 29 is normallyheld closely adjacent the side of the casing as is shown in Ifig. 1. To avoid injury to the parts by the violent engagement of the handle with the casin the casing, if the handle be released, I provide a short section of coil spring encircling the cable and between the outer end of the bearing tube 30 and the cable 29. This may be connected to the handle or to the easing, or may be loose on the cable. It should be of sufficiently large diameter that it cannot pass into the tube 30 and should be of sufficiently small diameter so that it cannot slide up on to the adjacent part of the handle 29.

In addition to the handle 29, there is a second handle 34 rigid with the casing. As

. shown, this handle is cast integral with the upper casing section 10 but this is not essential. The handle might be formed separately and detachably secured if desired. The base or stem of the handle is preferably of sufficiently large diameter so that the socket for the upper end of the shaft and th thrust bearing are formed therein.

It Will be noted that the stem ofthe handie 34 is substantially in alinement with the tool so that by grasping the handle 34, the tool may be readily placed in position and may be used to press the valve as tightly against its seat as may be desired. The handie 29 may be readily-pulled out in a plane at right angles to the axis of the tool so as to rotate the tool in one direction, and by relieving the tension on the handle, the spring will draw the handle 29 back to its original position and rotate the tool in the opposite direction. By means of my improved device ayalve may be rapidly oscillated and at the same time pressed against its seat and effectively ground.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A device for oscillating valves to grind the same, including a two-part casing, a supporting handle on one part, a shaft extending through the other part and engaging with a thrust bearing in the first mentioned part substantially in line with said handle, a drum within said casing and secured to said shaft, a spring within said casing and having one end connected to said shaft and the opposite end connected to said casing, a cable wound on said drum and having one end secured to the latter and the other end extending to the exterior of said casing, and a handle on the outer end of said cable whereby the latter may be pulled out to rotate said shaft in one direction and ,wind said springand when released, the shaft will be rotated in the opposite direction by thernpring and the cable rewound. I

Signed at \Valthamin the county of MiddleseX and State of Massachusetts this thirtieth day of October, A. D. 1915.

FREDERICK C. HERSEE.

Witnesses:

SOLOMAN A. CAMPBELL, CELIA HARRIS. 

